EP3906259A2 - Compositions pour augmenter la demi-vie d'un agent thérapeutique chez les chiens et procédés d'utilisation - Google Patents

Compositions pour augmenter la demi-vie d'un agent thérapeutique chez les chiens et procédés d'utilisation

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Publication number
EP3906259A2
EP3906259A2 EP20708719.8A EP20708719A EP3906259A2 EP 3906259 A2 EP3906259 A2 EP 3906259A2 EP 20708719 A EP20708719 A EP 20708719A EP 3906259 A2 EP3906259 A2 EP 3906259A2
Authority
EP
European Patent Office
Prior art keywords
amino acid
acid position
polypeptides
polypeptide
canine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20708719.8A
Other languages
German (de)
English (en)
Inventor
William Brondyk
Brett Chevalier
Juergen Horn
Madhusudan NATARAJAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Invetx Inc
Original Assignee
Invetx Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Invetx Inc filed Critical Invetx Inc
Publication of EP3906259A2 publication Critical patent/EP3906259A2/fr
Pending legal-status Critical Current

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    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
    • C07K16/283—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against Fc-receptors, e.g. CD16, CD32, CD64
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
    • A61P13/12—Drugs for disorders of the urinary system of the kidneys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P15/00—Drugs for genital or sexual disorders; Contraceptives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00—Drugs for dermatological disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/04—Anorexiants; Antiobesity agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P33/00—Antiparasitic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/02—Immunomodulators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/08—Antiallergic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P5/00—Drugs for disorders of the endocrine system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/06—Antianaemics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C07K2317/524—CH2 domain
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C07K2317/526—CH3 domain
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/569—Single domain, e.g. dAb, sdAb, VHH, VNAR or nanobody®
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
    • C07K2317/622—Single chain antibody (scFv)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/71—Decreased effector function due to an Fc-modification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/94—Stability, e.g. half-life, pH, temperature or enzyme-resistance
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide

Definitions

  • polypeptides e.g., fusion polypeptides such as polypeptide-Fc region fusions; or binding molecules such as antibodies or ligandbinding portions of receptor-Fc fusions
  • polypeptides e.g., fusion polypeptides such as polypeptide-Fc region fusions; or binding molecules such as antibodies or ligandbinding portions of receptor-Fc fusions
  • the Fc region of antibodies plays a number of functional roles, including, but not limited to, protecting the antibody from degradation through the lysosomal pathway and mediating antibody effector functions.
  • canine antibodies as therapeutic agents, there has been an enhanced focus on not just selecting an optimal Fab, but also combining it with an appropriate Fc for desired half-life and effector functions.
  • polypeptides that have increased binding to canine FcRn than control polypeptides (e.g., the wild type counterpart IgG canine Fc regions). In some instances, these polypeptides have increased binding to canine FcRn than control polypeptides at any pH (e.g., at any pH between about 5.0 to about 8.0). In some instances, these polypeptides have increased binding to canine FcRn than control polypeptides at pH 5.5 and/or pH 6.5. In some instances, these polypeptides have increased binding to canine FcRn than control polypeptides at pH 5.5 and/or pH 6.5. In some instances, these polypeptides have increased binding to canine FcRn than control polypeptides at pH 5.5 and/or pH 6.5. In some instances, these polypeptides have increased binding to canine FcRn than control polypeptides at pH 5.5 and/or pH 6.5. In some instances, these polypeptides have increased binding to canine FcRn than control polypeptide
  • polypeptides can, e.g., bind to canine FcRn at a higher level at acidic pH (e.g., pH 5.5 or pH6.5) than at a neutral pH (e.g., pH 7.0, 7.1, 7.2, 7.3, 7.4, or 7.5). In some instances, these polypeptides bind to canine FcRn at a higher level at pH 5.5 than at pH 7.4.
  • This disclosure relates, in part, to polypeptides that have increased half-life in canines than their wild type counterparts.
  • binding molecules e.g., antibodies or ligand-binding portions of receptors
  • Fc regions e.g., CH2, CFI3, or CH2+CH3 regions
  • enzyme-Fc region fusions, ligand-Fc region fusions, and peptide-Fc region fusions wherein the fusions have increased half-life compared with their wild type counterparts.
  • the Fc regions in addition to having a substitution or substitutions (relative to the wild type canine Fc region) that increase half-life may also include other substitutions that, e.g., increase effector function, decrease effector function, and/or decrease heterogeneity of the polypeptide (e.g., by removing one or more post-translational modifications in the Fc region).
  • the canine CH2, CH3, and Fc region sequences can be from any canine antibody. In some instances, the canine CH2, CH3, and Fc region sequences are from a canine IgG (e.g., IgG.A, IgG.B, IgG.C, or IgG.D).
  • the disclosure features a recombinant protein comprising (1) a binding domain, or a fragment thereof, that specifically binds to a ligand, or an epitope of a protein, wherein the binding domain is attached to (2) a domain comprising a CH2 region, a CF13 region, or an Fc region (CH2+ CH3 region) disclosed herein.
  • the binding domain comprises (i) the six complementarity determining regions (CDRs) of a canine or human/humanized antibody; (ii) the VH and/or VL of a canine, caninized, humanized, or human antibody; (iii) a nanobody; (iv) a scFv; (v) an Fab; or (vi) a soluble receptor-binding domain that binds a ligand, or a ligand-binding fragment thereof.
  • CDRs complementarity determining regions
  • the disclosure also provides a composition
  • a composition comprising: (1) a first polypeptide comprising a first Fc region (e.g., a CH2 region, a CH3 region, a CFI2+ CH3 region) comprising a canine IgG Fc region variant described herein; and (2) a second polypeptide comprising a second Fc region comprising a canine IgG Fc region variant described herein.
  • the first and second polypeptide can be associated through the first and second Fc regions.
  • the amino acid sequences of the first and second Fc regions are the same.
  • the amino acid sequences of the first and second Fc regions are different (e.g., by 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 amino acids).
  • the Fc region variant is a variant of a canine IgG.B antibody Fc region.
  • the Fc region variant is a variant of a canine IgG.A antibody Fc region.
  • the Fc region variant is a variant of a canine IgG.C antibody Fc region.
  • the Fc region variant is a variant of a canine IgG.D antibody Fc region.
  • a fusion molecule comprising a canine IgG Fc region variant disclosed herein and a polypeptide.
  • the canine IgG Fc region variant is covalently attached to the polypeptide (e.g., through a hinge region or a linker).
  • the polypeptide is a ligand binding domain of a canine receptor protein, an extracellular domain of a canine receptor protein, or an antigen-binding domain.
  • the polypeptide is selected from the ligand binding domain or extracellular domain of canine IL-13Ral, or IL-13Ra2, canine EPO, canine CTLA4, canine LFA3, canine VEGFR1/VEGFR3, canine IL-1R, canine GLP-1 receptor agonist, and canine
  • the polypeptide is a scFv, a nanobody, or single domain antibody.
  • the IgG Fc region variant is a variant of a canine IgG.B antibody Fc region.
  • the IgG Fc region variant is a variant of a canine IgG.A antibody Fc region.
  • the IgG Fc region variant is a variant of a canine IgG.C antibody Fc region.
  • the IgG Fc region variant is a variant of a canine IgG.D antibody Fc region.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc CH2 region variant, the CH2 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO: l, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH2 region in place of the IgG Fc CH2 region variant; and/or (2) increased binding to canine FcRn than the control polypeptide or polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO: 1.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc CH2 region variant, the CH2 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:2, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH2 region in place of the IgG Fc CH2 region variant; and/or (2) increased binding to canine FcRn than the control polypeptide or polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:2.
  • the disclosure further provides a polypeptide or polypeptides comprising a canine IgG Fc CH2 region variant, the CH2 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NOG, and comprises at least one of the following: an amino acid other than lie at amino acid position 250,
  • the polypeptide or polypeptides has/have: increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH2 region in place of the IgG Fc CH2 region variant.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NOG.
  • the disclosure is related to a polypeptide or polypeptides comprising a canine IgG Fc CH2 region variant, the CH2 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:4, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH2 region in place of the IgG Fc CH2 region variant; and/or (2) increased binding to canine FcRn than the control polypeptide or polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:4.
  • polypeptide or polypeptides comprise(s) at least one of the following:
  • polypeptide or polypeptides comprise(s) at least one of the following:
  • the canine IgG Fc CH2 region variant comprises at least one of the following:
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc CH3 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:5, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH3 region in place of the IgG Fc CH3 region variant; and/or (2) increased binding to canine FcRn than the control polypeptide or polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:5.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc CH3 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:6, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH3 region in place of the IgG Fc CH3 region variant; and/or (2) increased binding to canine FcRn than the control polypeptide or polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:6.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc CH3 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:7, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH3 region in place of the IgG Fc CH3 region variant.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:7.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc CH3 region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:8, and comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc CH3 region in place of the IgG Fc CH3 region variant; and/or (2) increased binding to canine FcRn than the control polypeptide or polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:8.
  • polypeptide or polypeptides comprise(s) at least one of the following:
  • the canine IgG Fc CH3 region variant comprises:
  • polypeptide or polypeptides comprise(s) Tyr, Trp,
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:9, and that comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc region in place of the IgG Fc region variant; and/or (2) increased binding to canine FcRn than the control polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO:9.
  • the disclosure also provides a polypeptide or polypeptides comprising a canine IgG Fc region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO: 10, and that comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc region in place of the IgG Fc region variant; and/or (2) increased binding to canine FcRn than the control polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO: 10.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO:l 1, and that comprises at least one of the following:
  • the polypeptide or polypeptides has/have: increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc region in place of the IgG Fc region variant.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO: 11.
  • the disclosure provides a polypeptide or polypeptides comprising a canine IgG Fc region variant comprising an amino acid sequence that is at least 75% identical to the sequence set forth in SEQ ID NO: 12, and that comprises at least one of the following:
  • the polypeptide or polypeptides has/have: (1) increased half-life in a dog than a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or polypeptides except for having the corresponding wild type canine IgG Fc region in place of the IgG Fc region variant; and/or (2) increased binding to canine FcRn than the control polypeptides; and wherein the amino acid positions are based on EU numbering.
  • the amino acid sequence is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the sequence set forth in SEQ ID NO: 12.
  • polypeptide or polypeptides comprise at least one of the following:
  • polypeptide or polypeptides comprise(s) at least one of the following:
  • the canine IgG Fc region variant comprises at least one of the following:
  • polypeptide or polypeptides is/are an antigen binding domain(s).
  • the antigen binding domain(s) bind to an antigen selected from the group consisting ofNGF, TrKA, AD AMTS, IL-1, IL-2, IL-4, IL-4R, Angiotensin type 1 (ATI) receptor, Angiotensin type 2 (AT2) receptor, IL-5, IL-12, IL-13, IL-31, IL-33, TNF-alpha, IgE, PD-1, PD-1 ligand, CD3, CD20, CD47, CD52, 0X40, 0X40 ligand, CTLA4, VEGF, EGFR, NAV 1.7, and complement system complex (e.g., Cl complex, C2 complex, C3 complex, C4 complex, C5 complex, C6 complex, C7 complex, C8 complex, C9 complex).
  • ATI Angiotensin type 1
  • AT2 Angiotensin type 2
  • CTLA4 VEGF
  • EGFR NAV 1.7
  • complement system complex e.g., Cl complex, C
  • the antigen binding domain(s) is/are a scFv, scFab, or nanobody.
  • the polypeptide or polypeptides described herein further comprise a protein.
  • the protein is selected from the group consisting of EPO, CTLA4, LFA3, VEGFR1/VEGFR3, IL-1R, IL-4R, GLP-1 receptor agonist, and Thrombopoietin binding peptide.
  • the disclosure provides a pharmaceutical composition comprising (i) the polypeptide or polypeptides described herein, and (ii) a pharmaceutically acceptable excipient.
  • the disclosure provides a nucleic acid or nucleic acids encoding the polypeptide or polypeptides described herein.
  • the disclosure provides an expression vector or expression vectors comprising the nucleic acid or nucleic acids described herein.
  • the disclosure provides a host cell comprising the nucleic acid or nucleic acids described herein or the expression vector or expression vectors described herein.
  • the disclosure provides a method of making a polypeptide or polypeptides, the method comprising
  • the method further comprises formulating the polypeptide or polypeptides as a pharmaceutical formulation.
  • the disclosure provides a method of treating a canine disease or disorder in a dog in need thereof, the method comprising administering an effective amount of a composition comprising the pharmaceutical composition described herein to the dog.
  • the disclosure provides a method of preventing a canine disease or disorder in a dog in need thereof, the method comprising administering an effective amount of a composition comprising the pharmaceutical composition described herein to the dog.
  • the disease or disorder is an allergic disease, a chronic pain, an acute pain, an inflammatory disease, an autoimmune disease, an endocrine disease, a gastrointestinal disease, a cardiovascular disease, a renal disease, a fertility related disorder, an infectious disease or a cancer.
  • the disease or disorder is atopic dermatitis, allergic dermatitis, osteoarthritic pain, arthritis, anemia, or obesity.
  • FIG. 1 is an amino acid sequence alignment of canine IgG g chains. These chains contain VH, CHI, CH2, and CH3 domains and the hinge region between CHI and CH2. An N-glycosylation site is shown in bold and marked in a block. These sequences are assigned SEQ ID NOs.: 13, 14, 15, and 16, respectively.
  • FIG. 2 is an amino acid sequence alignment of the CH2 region of canine IgG g chains. These sequences are assigned SEQ ID NOs.: 1, 2, 3, and 4, respectively. Residues that are substituted to increase half-life are identified by underlines.
  • FIG. 3 is an amino acid sequence alignment of the CIT3 region of canine IgG g chains. These sequences are assigned SEQ ID NOs.: 5, 6, 7, and 8, respectively. Residues that are substituted to increase half-life are identified by underlines.
  • FIG. 4 is an amino acid sequence alignment of the Fc region of canine IgG g chains. These sequences are assigned SEQ ID NOs.: 9, 10, 1 1, and 12, respectively. Residues that are substituted to increase half-life are identified by underlines.
  • FIG. 5 is a table provided EU numbering for the CH2 region of canine IgG.
  • FIG. 6 is a table provided EU numbering for the CH3 region of canine IgG.
  • FIGs. 7A-7U depict Biacore sensorgrams from the alanine scanning mutagenesis experiment.
  • the lighter line on each figure represents the measured data and the darker line represents the fitted curve using a 1 : 1 interaction model.
  • FIGs. 8A-8C depict Biacore sensorgrams for wild type and the different variants from the NNK libraries at position 250.
  • the lighter line on each figure represents the measured data and the darker line is the fitted curve using a 1 : 1 interaction model.
  • FIGs. 9A-9C depict Biacore sensorgrams for wild type and the different variants from the NNK libraries at position 252.
  • the lighter line on each figure represents the measured data and the darker line is the fitted curve using a 1 : 1 interaction model.
  • FIGs. 10A and 10B depict Biacore sensorgrams for wild type and the variant
  • the lighter line represents the measured data and the darker line represents the fitted curve using a 1 :1 interaction model.
  • FIGs. 11 A and 1 IB depict Biacore sensorgrams for wild type and the variant
  • the lighter line represents the measured data and the darker line represents the fitted curve using a 1 : 1 interaction model.
  • FIGs. 12A and 12B depict Biacore sensorgrams for wild type and the variant
  • the lighter line represents the measured data and the darker line represents the fitted curve using a 1 :1 interaction model.
  • FIGs. 13A and 13B depict Biacore sensorgrams for wild type and the variant
  • FIGs. 14A and 15B depict Biacore sensorgrams for wild type and the variant
  • the lighter line represents the measured data and the darker line represents the fitted curve using a 1 : 1 interaction model.
  • FIGs. 15A-15F depict Biacore sensorgrams for wild type and the different variants from the NNK libraries at position 434.
  • the lighter line represents the measured data and the darker line represents the fitted curve using a 1 : 1 interaction model.
  • FIGs. 16A-16E depict Biacore sensorgrams for different variants in a concentration series.
  • concentration of canine FcRn used were 100 nM (white circle), 200 nM (black circle), 400 nM (black triangle), and 800 nM (white triangle).
  • the lighter line on each figure is the measured data and the darker line is the fitted curve using a 1 : 1 interaction model.
  • polypeptide e.g., antibodies, ligand-binding domains of receptors, enzymes, ligands, peptides
  • polypeptides e.g., antibodies, ligand-binding domains of receptors, enzymes, ligands, peptides
  • this disclosure features canine immunoglobulin CH2, CH3, and
  • Fc regions comprising mutations that enhance the half-life of a polypeptide or polypeptides comprising these sequences. Also disclosed are polypeptides comprising these domains and methods of their use. These peptides can be used for various therapeutic and diagnostic purposes.
  • Dogs have four IgG heavy chains referred to as A, B, C, and D. These heavy chains represent four different subclasses of dog IgG, which are referred to as IgG. A, IgG.B, IgG.C and IgG.D.
  • the amino acid and DNA sequences for these heavy chains are available from Tang et al., Vet. Immunol. Immunopathol., 80: 259-270 (2001) and the GENBANK database. For example, the amino acid sequence of IgG.
  • a heavy chain has GENBANK accession number AAL35301.1
  • IgG.B has GENBANK accession number AAL35302.1
  • IgG.C has GENBANK accession number AAL35303.1
  • IgG.D has GENBANK accession number AAL35304.1.
  • Canine antibodies also include two types of light chains: kappa and lambda.
  • the DNA and amino acid sequence of these light chains can also be obtained from GENBANK database.
  • the dog kappa light chain amino acid sequence has accession number ABY 57289.1
  • the dog lambda light chain has accession number ABY 55569.1.
  • the CH2 region of a canine antibody comprises or consists of amino acids 237 to 340 (according to EU numbering) of a canine IgG antibody. It is to be understood that the CH2 region may include one to six (e.g., 1, 2, 3, 4, 5, 6) additional amino acids or deletions at their N and/or C-terminus.
  • amino acid sequence of the CH2 region of canine IgG.A is provided below:
  • amino acid sequence of the CH2 domain of canine IgG.B is provided below:
  • amino acid sequence of the CH2 domain of canine IgG.C is provided below:
  • amino acid sequence of the CH2 domain of canine IgG.D is provided below:
  • CH3 Region of a Canine Fc region [0093]
  • the CH3 region of a canine antibody comprises or consists of amino acids 345 to 447 (according to EU numbering) of a canine IgG antibody. It is to be understood that the CH3 region may include one to six (e.g., 1, 2, 3, 4, 5, 6) additional amino acids or deletions at their N and/or C-terminus.
  • amino acid sequence of the CH3 domain of canine IgG. A is provided below:
  • amino acid sequence of the CH3 domain of canine IgG.B is provided below:
  • amino acid sequence of the CH3 domain of canine IgG.C is provided below:
  • amino acid sequence of the CH3 domain of canine IgG.D is provided below:
  • the Fc region of a canine IgG antibody comprises or consists of amino acids
  • amino acid sequence of the Fc domain of canine IgG.A is provided below:
  • amino acid sequence of the Fc domain of canine IgG.C is provided below:
  • amino acid sequence of the Fc domain of canine IgG.D is provided below:
  • EWQSNGQPEP ESKYHTTAPQ LDEDGSYFLY SKLSVDKSRW QQGDTFTCAV
  • polypeptides comprising these Fc regions in a dog relative to a control polypeptide or control polypeptides, wherein the control polypeptide or control polypeptides are identical to the polypeptide or
  • polypeptides except for having the corresponding wild type canine IgG Fc region in place of the IgG Fc region variant.
  • substitutions to increase half-life may be made in a canine CH2 region, a canine CH3 region, or in the context of a canine Fc (i.e., a CH2+CH3) region.
  • this disclosure provides a canine IgG CH2 region variant comprising an amino acid sequence that is at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence set forth in any one of SEQ ID NOs.: 1 to 4. Also provided are canine IgG CH2 region variants comprising an amino acid sequence that varies from any one of SEQ ID NOs.:l to 4 by 1 to 15 amino acids.
  • this disclosure features a canine IgG CH3 region variant comprising an amino acid sequence that is at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence set forth in any one of SEQ ID NOs.:5 to 8. Also featured are canine IgG CH3 region variants comprising an amino acid sequence that varies from any one of SEQ ID NOs.:5 to 8 by 1 to 15 amino acids.
  • this disclosure features a canine IgG Fc region variant comprising an amino acid sequence that is at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence set forth in any one of SEQ ID NOs.:9 to 12. Also disclosed are canine IgG Fc region variants comprising an amino acid sequence that varies from any one of SEQ ID NOs.:9 to 12 by 1 to 20 amino acids.
  • At least one (e.g. 1, 2, or 3) of the following regions in the canine IgG Fc CH2 region variant are identical to the corresponding regions in a wild type canine IgG Fc CH2 region:
  • amino acid positions 307-315 wherein the amino acid positions are based on EU numbering.
  • all of the above regions in the canine IgG Fc CH2 region variant are identical to the corresponding regions in a wild type canine IgG Fc CH2 region.
  • At least one (e.g. 1 or 2) of the following regions in the canine IgG Fc CH3 region variant are identical to the corresponding regions in a wild type canine IgG Fc CH3 region:
  • Amino acid positions 428-436 wherein the amino acid positions are based on EU numbering.
  • all of the above regions in the canine IgG Fc CH3 region variant are identical to the corresponding regions in a wild type canine IgG Fc CFI3 region.
  • At least one (e.g., 1, 2, 3, 4, or 5) of the following regions in the canine IgG Fc variant are identical to the corresponding regions in a wild type canine IgG Fc:
  • all of the following regions in the canine IgG Fc variant are identical to the corresponding regions in a wild type canine IgG Fc.
  • a polypeptide or polypeptides comprising a canine IgG Fc CFI2 region variant, the CH2 region variant comprising an amino acid sequence that is at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence set forth in any one of SEQ ID NOs.: l to 4.
  • a polypeptide or polypeptides comprising a canine IgG Fc CH3 region variant, the CH3 region variant comprising an amino acid sequence that is at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence set forth in any one of SEQ ID NOs.:5 to 8.
  • a polypeptide or polypeptides comprising a canine IgG Fc region variant, the Fc region variant comprising an amino acid sequence that is at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to the amino acid sequence set forth in any one of SEQ ID NOs.:9 to 12.
  • the above-described polypeptide or polypeptides comprise(s) a canine IgG CH2 region including one or more (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9,10,
  • amino acid positions are based on EU numbering of the canine IgG.A, IgG.B, IgG.C, and IgG.D antibodies.
  • the above-described polypeptide or polypeptides comprise(s) a canine IgG CH3 region including one or more (e.g., 1, 2, 3, 4, 5, 6, 7, or 8) of: an amino acid other than the wild type amino acid occurring at amino acid position
  • the above-described polypeptide or polypeptides comprise a canine IgG Fc region including one or more (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12, 13, 14, 15, 16, 17, 18, 19, or 20) of:
  • amino acid positions are based on EU numbering of the canine IgG.A, IgG.B, IgG.C, and IgG.D antibodies.
  • substitutions that are encompassed by the present disclosure include one or more (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20) of those disclosed in Table 1.
  • substitutions that are encompassed by the present disclosure include one or more (e.g., 1, 2, 3, or 4) of those disclosed in Table 2.
  • substitutions include one or more of the following substitutions:
  • substitutions do not include the combination of Tyr at amino acid position 252, Thr at amino acid position 254, and Glu at amino acid position 256.
  • substitutions may be made on one or both chains of a CH2 domain, a CH3 domain, or an Fc domain. In some instances, the substitutions on both chains of a CH2 domain, a CH3 domain, or an Fc domain are identical. In some instances, the substitutions on both chains of a CH2 domain, a CH3 domain, or an Fc domain are not identical. In some instances, the Fc region includes one or more additional substitutions that increase or decrease effector function, improve product heterogeneity.
  • a therapeutic polypeptide/protein e.g., a monoclonal antibody
  • a complex process that entails coordination of a complex set of activities to generate the desired polypeptide/protein. These include optimization of the specificity, affinity, functional activity, expression level in engineered cell lines, long-term stability, elimination or enhancement of effector functions and development of commercially viable manufacturing and purification methods. This disclosure encompasses any additional substitution that facilitates any one or more of the above goals.
  • the substitutions are introduced to reduce effector function of the canine Fc region.
  • Such substitutions may be at one or more (e.g., 1, 2, 3, 4, 5, 6, or 7) of the following positions of the canine IgG (numbering according to EU numbering): 238, 265, 297, 298, 299, 327, and 329.
  • the substitution(s) can be to any of the other 19 amino acids. In some instances, the substitution is conservative.
  • the substituted amino acid at position 238 is Ala; the substituted amino acid at position 265 is Ala; the substituted amino acid at position 297 is Ala or Gin; the substituted amino acid at position 298 is Pro; the substituted amino acid at position 299 is Ala; the substituted amino acid at position 327 is Gly; and the substituted amino acid at position 329 is Ala.
  • the variant Fc region is from a canine IgG.B or IgG.C antibody.
  • substitutions are introduced to a wild type canine IgG
  • substitutions may be at one or both (e.g., 1, 2, 3, 4, 5, 6, or 7) of the following positions of the canine IgG (numbering according to EU numbering): 252 and 254.
  • the substitution(s) can be to any of the other 19 amino acids. In some instances, the substitution is conservative. In certain non-limiting instances, the substituted amino acid at position 252 is Met; and the substituted amino acid at position 254 is Ser.
  • substitutions are made to alter binding affinity to
  • the modification can be one, two, three, or four modifications that are selected from the group consisting of: 308F, 428L, 434M and 434S, where the numbering is according to the EU numbering.
  • the Fc variant includes one or more modifications selected from the group consisting of:
  • the Fc variant includes one or more modification selected from the group consisting of: 428L/434S, 308F/428L/434S, where the numbering is according to the EU numbering.
  • the Fc variant includes one or more modifications selected from the group consisting of: 259I/434S, 308F/434S, 308F/428L/434S, 259I/308F/434S, 307Q/308F/434S, 250I/308F/434S, and 308F/319L/434S, where the numbering is according to the EU numbering.
  • modifications selected from the group consisting of: 259I/434S, 308F/434S, 308F/428L/434S, 259I/308F/434S, 307Q/308F/434S, 250I/308F/434S, and 308F/319L/434S, where the numbering is according to the EU numbering.
  • US8883973B2 which is incorporated herein by reference in its entirety.
  • the polypeptide comprises a hinge region of a canine antibody.
  • modifications can be made to the hinge region of the canine antibody to increase half-life.
  • the modification is 228P according to EU numbering.
  • the binding with FcRn is pH-dependent. H310 and
  • H435 can be critical for pH-dependent binding.
  • the amino acids at position 310 is histidine.
  • the amino acids at position 435 is histidine.
  • the amino acids at both positions are histidine.
  • the Fc region has LALA mutations (L234A and L235A mutations in EU numbering), or LALA-PG mutations (L234A, L235A, P329G mutations in EU numbering).
  • the amino acid residue at position 234 (EU numbering) is Ala. In some embodiments, the amino acid residue at position 234 (EU numbering) is Ala. In some embodiments, the amino acid residues at positions 234 and 235 (EU numbering) are Ala.
  • the disclosure encompasses any polypeptide that may benefit from having an increased half-life in a dog.
  • these polypeptides are designed to include an Fc region variant (e.g., a CH2 region, a CH3 region, a CH2+CH3 region) disclosed above.
  • Exemplary polypeptides include, but are not limited to, whole antibodies, scFvs, nanobodies, ligand-binding portions of a receptor, cytokines, growth factors, enzymes, and peptides.
  • a CH3 domain variant disclosed above may be attached to an scFv nanobody, ligand-binding portion of a receptor (e.g., the ligand-binding portion of canine IL- 13Ral or IL-13Ra2), a cytokine, a growth factor, an enzyme, or a peptide.
  • an Fc region variant disclosed above may be attached to these polypeptides.
  • a canine or caninized antibody is modified to include an Fc region variant disclosed herein.
  • the polypeptides of this disclosure include an antibody hinge region.
  • the hinge region may be placed between the antigen or ligand-binding domain of the polypeptide and the Fc region variant.
  • the hinge region is attached to the C-terminus of a cytokine, a growth factor, an enzyme, or a peptide and the hinge region is atached to the N-terminus of the Fc region variant.
  • Exemplary hinge region sequences are provided below.
  • IgG.A FNECRCTDTPPCPVPEP (SEQ ID NO: 17);
  • IgG.B PKREN GR V PRPPDCPKCP APEM (SEQ ID NO: 18);
  • IgG.C AKECECKCNCNNCPCPGCGL (SEQ ID NO: 19);
  • IgG.D PKESTCKCISPCPVPES (SEQ ID NO: 20);
  • IgG.Dmut PKESTCKCIPPCPVPES (SEQ ID NO: 21).
  • the hinge region if used, in a recombinant protein of this disclosure may include zero to six (i.e., 0, 1, 2, 3, 4, 5, or 6) amino acid substitutions relative to an amino acid sequence set forth in any one of SEQ ID NOs.: 17-21.
  • the hinge region used in a recombinant protein of this disclosure is at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% identical to an amino acid sequence set forth in any one of SEQ ID NOs.: 17-21.
  • a linker sequence may be used instead of an antibody hinge sequence to connect the polypeptide (e.g., antibodies, ligand-binding domains of receptors, enzymes, ligands, peptides) to the canine Fc region variants disclosed herein.
  • the linker is made up of from 1 to 20 amino acids linked by peptide bonds, wherein the amino acids are selected from the 20 naturally occurring amino acids. Some of these amino acids may be glycosylated, as is well understood by those in the art.
  • the 1 to 20 amino acids are selected from glycine, alanine, proline, asparagine, glutamine, and lysine.
  • a linker is made up of a majority of amino acids that are sterically unhindered, such as glycine and alanine.
  • peptide linkers include: Gly, Ser; Gly Ser; Gly Gly Ser; Ser Gly Gly; Gly Gly Gly Ser (SEQ ID NO:22); Ser Gly Gly Gly (SEQ ID NO:23); Gly Gly Gly Gly Ser (SEQ ID NO:24); Ser Gly Gly Gly Gly (SEQ ID NO:25); Gly Gly Gly Gly Gly Ser (SEQ ID NO:26); Ser Gly Gly Gly Gly Gly (SEQ ID NO:27); Gly Gly Gly Gly Gly Ser (SEQ ID NO:28); Ser Gly Gly Gly Gly Gly Gly (SEQ ID NO:29); (Gly Gly Gly Ser) n (SEQ ID NO:24)n, wherein n is an integer of one or more (e.g.,
  • Non-peptide linkers may also be used to link the polypeptide or polypeptides of interest to an Fc region variant disclosed herein.
  • alkyl linkers such as
  • the polypeptide or polypeptides of this disclosure may comprise a binding domain.
  • the binding domain can specifically bind to a protein, subunit, domain, motif, and/or epitope of a selected target described herein.
  • the polypeptide or polypeptides can comprise a protein, wherein the protein is a therapeutic protein described herein.
  • the target (e.g., for the target of the binding domain) or the therapeutic protein (e.g., for the fusion polypeptide) is selected from the group consisting of: 17-1 A, 4- IBB, 4Dc, 6-keto-PGF 1 a, 8-iso-PGF2a, 8-oxo-dG, A1 Adenosine Receptor, A33, ACE, ACE-2, Activin, Activin A, Activin AB, Activin B, Activin C, Activin RIA, Activin RIA ALK-2, Activin RIB ALK-4, Activin RIIA, Activin RUB, ADAM, ADAM 10, ADAM 12, ADAM 15, ADAM17/TACE, ADAMS, ADAM9, AD AMTS, ADAMTS4,
  • BAK Bax, BCA-1 , BCAM, Bel, BCMA, BDNF, b-ECGF, bFGF, BID, Bik, BIM, BLC, BL- CAM, BLK, BMP, BMP-2 BMP-2a, BMP-3 Osteogenin, BMP-4 BMP-2b, BMP-5, BMP-6 Vgr-1, BMP-7 (OP-1), BMP-8 (BMP-8a, OP-2), BMPR, BMPR-IA (ALK-3), BMPR-IB (ALK-6), BRK-2, RPK-1, BMPR-II (BRK-3), BMPs, b-NGF, BOK, Bombesin, Bone- derived neurotrophic factor, BPDE, BPDE-DNA, BTC, complement factor 3 (C3), C3a, C4, C5, C5a, CIO, CA125, CAD-8, Calcitonin, cAMP, carcinoembryonic antigen (CEA),
  • Prorelaxin Protein C, PS, PSA, PSCA, prostate specific membrane antigen (PSMA), PTEN, PTHrp, Ptk, PTN, R51, RANK, RANKL, RANTES, RANTES, Relaxin A-chain, Relaxin B- chain, renin, respiratory syncytial virus (RSV) F, RSV Fgp, Ret, Rheumatoid factors, RLIP76, RPA2, RSK, SI 00, SCF/KL, SDF-1, SERINE, Serum albumin, sFRP-3, Shh, SIGIRR, SK-1, SLAM, SLPI, SMAC, SMDF, SMOH, SOD, SPARC, Stat, STEAP, STEAP- II, TACE, TACI, TAG-72 (tumor-associated glycoprotein-72), TARC, TCA-3, T-cell receptors (e.g., T-cell receptor alpha/beta), TdT, TECK,
  • TNFRSF26 (TNFRH3), TNFRSF3 (LTbR TNF RIII, TNFC R), TNFRSF4 (0X40 ACT35, TXGP1 R), TNFRSF5 (CD40 p50), TNFRSF6 (Fas Apo-1, APT1, CD95), TNFRSF6B (DcR3M68, TR6), TNFRSF7 (CD27), TNFRSF8 (CD30), TNFRSF9 (4-1BB CD137, ILA), TNFRSF21 (DR6), TNFRSF22 (DCTRAIL R2 TNFRH2), TNFRST23 (DCTRAIL
  • the binding domain specifically binds to one or more therapeutic targets or antigens in canine, such as, but are not limited to, ACE, ACE-2,
  • the polypeptide or polypeptides can comprise a protein, wherein the protein is a therapeutic protein, e.g., EPO, CTLA4, LFA3, VEGFR 1/VEGFR3, IL-1R, IL-4R, GLP-1 receptor agonist, or Thrombopoietin binding peptide.
  • a therapeutic protein e.g., EPO, CTLA4, LFA3, VEGFR 1/VEGFR3, IL-1R, IL-4R, GLP-1 receptor agonist, or Thrombopoietin binding peptide.
  • the therapeutic protein is ACE, ACE-2, Activin, Activin A, Activin AB, Activin B, Activin C, Activin RIA, Activin RIA ALK-2, Activin RIB ALK-4, Activin RIIA, Activin RUB, ADAM, ADAM 10, ADAM 12, ADAM 15, ADAM17/TACE, ADAMS, ADAM9, AD AMTS, ADAMTS4, ADAMTS5, ANG, Ang, Angiotensin type 1 (ATI) receptor, Angiotensin type 2 (AT2) receptor, Atrial natriuretic factor, av/b3 integrin, b- ECGF, CD 19, CD20, CD30, CD34, CD40, CD40L, CD47, COX, CTLA-4, EGFR (ErbB-1), EPO, Follicle stimulating hormone, GDF-8 (Myostatin), GLP1, GLP2, GnRH, Growth hormone releasing factor, IgE, IL
  • the therapeutic protein is any protein described herein.
  • the polypeptide or polypeptides further comprises a canine IgG CH2 domain, IgG CH3 domain, or IgG Fc region as described herein.
  • the modified canine IgG CH2 domain, IgG CH3 domain, or IgG Fc region can enhance the half-life the therapeutic proteins in vivo.
  • polypeptide or polypeptides described herein can be admixed with a pharmaceutically acceptable carrier or excipient.
  • a pharmaceutically acceptable carrier or excipient See, e.g., Remington's Pharmaceutical Sciences and U.S. Pharmacopeia: National Formulary, Mack Publishing Company, Easton, Pa. (1984)).
  • Formulations of therapeutic and diagnostic agents may be prepared by mixing with acceptable carriers, excipients, or stabilizers in the form of, e.g., lyophilized powders, slurries, aqueous solutions or suspensions (see, e.g., Hardman, et al. (2001) Goodman and Gilman's The Pharmacological Basis of Therapeutics, McGraw-Hill, New York, N.Y.;
  • polypeptide or polypeptides of the present invention are diluted to an appropriate concentration in a sodium acetate solution pH 5-6, and NaCl or sucrose is added for tonicity. Additional agents, such as polysorbate 20 or polysorbate 80, may be added to enhance stability.
  • Toxicity and therapeutic efficacy of the polypeptide compositions, administered alone or in combination with another agent can be determined by standard pharmaceutical procedures in cell cultures or experimental animals, e.g., for determining the LDso (the dose lethal to 50% of the population) and the EDso (the dose therapeutically effective in 50% of the population).
  • the dose ratio between toxic and therapeutic effects is the therapeutic index (LDso/EDso).
  • a polypeptide or polypeptides exhibiting high therapeutic indices are desirable.
  • the data obtained from these cell culture assays and animal studies can be used in formulating a range of dosage for use in canines.
  • the dosage of such compounds lies preferably within a range of circulating concentrations that include the EDso with little or no toxicity.
  • the dosage may vary within this range depending upon the dosage form employed and the route of administration.
  • the mode of administration can vary. Suitable routes of administration include oral, rectal, transmucosal, intestinal, parenteral; intramuscular, subcutaneous, intradermal, intramedullary, intrathecal, direct intraventricular, intravenous, intraperitoneal, intranasal, intraocular, inhalation, insufflation, topical, cutaneous, transdermal, or intra-arterial.
  • the polypeptide or polypeptides can be administered by an invasive route such as by injection.
  • the polypeptide or polypeptides is administered intravenously, subcutaneously, intramuscularly, intraarterially, intratumorally, or by inhalation, aerosol delivery.
  • compositions disclosed herein may also be administered by infusion. Examples of well-known implants and modules form administering
  • compositions include: U.S. Pat. No. 4,487,603, which discloses an implantable micro-infusion pump for dispensing medication at a controlled rate; U.S. Pat. No. 4,447,233, which discloses a medication infusion pump for delivering medication at a precise infusion rate; U.S. Pat. No. 4,447,224, which discloses a variable flow implantable infusion apparatus for continuous drug delivery; U.S. Pat. No. 4,439,196, which discloses an osmotic drug delivery system having multi-chamber compartments. Many other such implants, delivery systems, and modules are well known to those skilled in the art.
  • polypeptide or polypeptides may be administered in a local rather than systemic manner, for example, via injection of the antibody directly into an arthritic joint or pathogen-induced lesion characterized by immunopathology, often in a depot or sustained release formulation.
  • a targeted drug delivery system for example, in a liposome coated with a tissue-specific antibody, targeting, for example, arthritic joint or pathogen-induced lesion characterized by immunopathology.
  • the liposomes will be targeted to and taken up selectively by the afflicted tissue.
  • the administration regimen depends on several factors, including, without limitation, the age, weight, and physical condition of the canine being treated, the serum or tissue turnover rate of the therapeutic antibody, the level of symptoms, the immunogenicity of the therapeutic polypeptide or polypeptides, and the accessibility of the target cells in the biological matrix.
  • the administration regimen delivers sufficient therapeutic polypeptide or polypeptides to effect improvement in the target disease state, while simultaneously minimizing undesired side effects.
  • the amount of biologic delivered depends in part on the particular therapeutic polypeptide or polypeptides and the severity of the condition being treated. Guidance in selecting appropriate doses of therapeutic antibodies is available (see, e.g., Wawrzynczak Antibody Therapy, Bios Scientific Pub.
  • Determination of the appropriate dose of the polypeptide or polypeptides is made by one skilled in the art, e.g., using parameters or factors known or suspected in the art to affect treatment. Generally, the dose begins with an amount somewhat less than the optimum dose and it is increased by small increments thereafter until the desired or optimum effect is achieved relative to any negative side effects. Important diagnostic measures include those of symptoms of, e.g., the inflammation or level of inflammatory cytokines produced.
  • the disclosure also encompasses nucleic acid or nucleic acids encoding the polypeptide or polypeptides described herein, a vector or vectors comprising the nucleic acid or nucleic acids, and host cells comprising the nucleic acid or nucleic acids or the vector or vectors.
  • polypeptide or polypeptides described herein may be produced in bacterial or eukaryotic cells.
  • Some polypeptides, e.g., Fab’s can be produced in bacterial cells, e.g., E. coli cells.
  • Polypeptides can also be produced in eukaryotic cells such as transformed cell lines (e.g., CHO, 293E, COS, 293T, Hela).
  • polypeptides e.g., scFv’s
  • yeast cell such as Pichia (see, e.g., Powers et al., J Immunol Methods. 251 : 123-35 (2001)), Hanseula, or Saccharomyces.
  • a polynucleotide or polynucleotides encoding the polypeptide or polypeptides is/are constructed, introduced into an expression vector or expression vectors, and then expressed in suitable host cells.
  • the nucleotide sequences of the genes can be recoded without changing (or minimally changing - e.g., removal of a C-terminal residue of the heavy or light chain) the amino acid sequence.
  • the areas for potential recoding include those associated with translation initiation, codon usage, and possible unintended mRNA splicing.
  • Polynucleotides encoding an Fc region variant described herein would be readily envisioned by the ordinarily skilled artisan.
  • Standard molecular biology techniques can be used to prepare the recombinant expression vector(s), transfect the host cells, select for transformants, culture the host cells, and recover the polypeptide (e.g., antibody).
  • the expression vector should have characteristics that permit amplification of the vector in the bacterial cells. Additionally, when E. coli such as JM109, DH5a, HB101, or XLl-Blue is used as a host, the vector must have a promoter, for example, a lacZ promoter (Ward et al., 341 :544-546 (1989), araB promoter (Better et ah, Science , 240: 1041-1043 (1988)), or T7 promoter that can allow efficient expression in E. coli.
  • a promoter for example, a lacZ promoter (Ward et al., 341 :544-546 (1989), araB promoter (Better et ah, Science , 240: 1041-1043 (1988)
  • T7 promoter that can allow efficient expression in E. coli.
  • Such vectors include, for example, Ml 3-series vectors, pUC-series vectors, pBR322, pBluescript, pCR-Script, pGEX- 5X-1 (Pharmacia),“QIAexpress system” (QIAGEN), pEGFP, and pET (when this expression vector is used, the host is preferably BL21 expressing T7 RNA polymerase).
  • the expression vector may contain a signal sequence for antibody secretion.
  • the pelB signal sequence Lei et ah, J. Bacteriol., 169:4379 (1987)
  • calcium chloride methods or electroporation methods may be used to introduce the expression vector into the bacterial cell.
  • polypeptide or polypeptides is to be expressed in animal cells such as
  • the expression vector includes a promoter necessary for expression in these cells, for example, an SV40 promoter (Mulligan et al, Nature, 277: 108 (1979)) (e.g., early simian virus 40 promoter), MMLV-LTR promoter, EFla promoter (Mizushima et al., Nucleic Acids Res., 18:5322 (1990)), or CMV promoter (e.g., human cytomegalovirus immediate early promoter).
  • SV40 promoter Mulligan et al, Nature, 277: 108 (1979)
  • MMLV-LTR promoter e.g., MMLV-LTR promoter
  • EFla promoter e.g., EFla promoter
  • CMV promoter e.g., human cytomegalovirus immediate early promoter
  • the recombinant expression vectors may carry additional sequences, such as sequences that regulate replication of the vector in host cells (e.g., origins of replication) and selectable marker genes.
  • the selectable marker gene facilitates selection of host cells into which the vector has been introduced (see e.g., U.S. Pat. Nos. 4,399,216, 4,634,665 and 5,179,017).
  • the selectable marker gene confers resistance to drugs, such as G418, hygromycin, or methotrexate, on a host cell into which the vector has been introduced.
  • vectors with selectable markers include pMAM, pDR2, pBK-RSV, pBK-CMV, pOPRSV, and pOP13.
  • the polypeptide or polypeptides are produced in mammalian cells.
  • exemplary mammalian host cells for expressing polypeptide or polypeptides include Chinese Hamster Ovary (CHO cells) (including dhfr- CHO cells, described in Urlaub and Chasin (1980) Proc. Natl. Acad. Sci. USA 77:4216-4220, used with a DHFR selectable marker, e.g., as described in Kaufman and Sharp (1982) Mol. Biol.
  • a recombinant expression vector encoding both the antibody heavy chain and the antibody light chain of the antibody is introduced into dhfr- CHO cells by calcium phosphate-mediated transfection.
  • the antibody heavy and light chain genes are each operatively linked to enhancer/promoter regulatory elements (e.g., derived from SV40, CMV, adenovirus and the like, such as a CMV enhancer/ AdMLP promoter regulatory element or an SV40 enhancer/AdMLP promoter regulatory element) to drive high levels of transcription of the genes.
  • enhancer/promoter regulatory elements e.g., derived from SV40, CMV, adenovirus and the like, such as a CMV enhancer/ AdMLP promoter regulatory element or an SV40 enhancer/AdMLP promoter regulatory element
  • the recombinant expression vector also carries a DHFR gene, which allows for selection of CHO cells that have been transfected with the vector using methotrexate selection/amplification.
  • the selected transformant host cells are cultured to allow for expression of the antibody heavy and light chains and the antibody is recovered from the culture medium.
  • polypeptide or polypeptides disclosed herein can be used to treat or prevent any disease or disorder in a dog in need thereof. This invention is particularly helpful in the treatment of chronic conditions where repeated dosing is required. Because of the increased half-life of the protein therapeutic, less frequent dosing and/or reduced dose levels may be possible.
  • the disease, disorder, condition or symptoms being treated or prevented is an allergic disease, a chronic pain, an acute pain, an inflammatory disease, an autoimmune disease, an endocrine disease, a gastrointestinal disease, a skeletal/musculosceletal disease, a cardiovascular disease, a neurological disease, a renal disease, a metabolic disease, a immunological disease, a genetic/inherited disease, a fertility related disorder, an infectious disease or a cancer.
  • the disease or disorder being treated or prevented is atopic dermatitis, allergic dermatitis, food allergy, osteoarthritic pain, perioperative pain, dental pain, cancer pain, arthritis, anemia, obesity, or diabetes.
  • Antibodies may not only be used to treat or prevent disease but also modulate normal biological function for example manage fertility or behavior.
  • polypeptide or polypeptides disclosed herein can also be used for various diagnostic purpose, for example, to determine whether a dog has any particular disease or disorder.
  • the polypeptide or polypeptides may comprise a binding domain.
  • the binding domain can specifically bind to a protein, subunit, domain, motif, and/or epitope as described herein (e.g., a maker for cancer cells).
  • the polypeptide or polypeptides further comprises a labeling group.
  • label groups fall into a variety of classes, depending on the assay in which they are to be detected: a) isotopic labels, which may be radioactive or heavy isotopes; b) magnetic labels (e.g., magnetic particles); c) redox active moieties; d) optical dyes; enzymatic groups (e.g. horseradish peroxidase, b-galactosidase, luciferase, alkaline phosphatase); e) biotinylated groups; and f) predetermined polypeptide epitopes recognized by a secondary reporter (e.g., leucine zipper pair sequences, binding sites for secondary antibodies, metal binding domains, epitope tags, etc.).
  • the labelling group is coupled to the antibody via spacer arms of various lengths to reduce potential steric hindrance.
  • Various methods for labelling proteins are known in the art and may be used in performing the present invention.
  • the labeling group is a probe, a dye (e.g., a fluorescent dye), or a radioactive isotope (e.g., 3 H, 14 C, 22 Na, 36 C1, 35 S, 33 P, or I25 I).
  • a dye e.g., a fluorescent dye
  • a radioactive isotope e.g., 3 H, 14 C, 22 Na, 36 C1, 35 S, 33 P, or I25 I.
  • Specific labels can also include optical dyes, including, but not limited to, chromophores, phosphors and fluorophores, with the latter being specific in many instances.
  • Fluorophores can be either“small molecule” fluores, or proteinaceous fluores.
  • the fluorescent label can be any molecule that may be detected via its inherent fluorescent properties. Suitable fluorescent labels include, but are not limited to, fluorescein, rhodamine, tetramethylrhodamine, eosin, erythrosin, coumarin, methyl-coumarins, pyrene, Malacite green, stilbene, Lucifer Yellow, Cascade BlueJ, Texas Red, IAEDANS, EDANS, BODIPY FL, LC Red 640, Cy 5, Cy 5.5, LC Red 705, Oregon green, the Alexa-Fluor dyes (Alexa Fluor 350, Alexa Fluor 430, Alexa Fluor 488, Alexa Fluor 546, Alexa Fluor 568,
  • Alexa Fluor 594 Alexa Fluor 633, Alexa Fluor 660, Alexa Fluor 680
  • Cascade Blue
  • Suitable proteinaceous fluorescent labels also include, but are not limited to, green fluorescent protein, including a Renilla, Ptilosarcus, or Aequorea species of GFP (Chalfie et al., 1994, Science 263:802-805), EGFP (Clontech Laboratories, Inc., Genbank Accession Number U55762), blue fluorescent protein (BFP, Quantum Biotechnologies, Inc. 1801 de Maisonneuve Blvd. West, 8th Floor, Montreal, Quebec, Canada H3H1J9; Stauber, 1998, Biotechniques 24:462-471 ; Heim et al., 1996, Curr. Biol.
  • green fluorescent protein including a Renilla, Ptilosarcus, or Aequorea species of GFP (Chalfie et al., 1994, Science 263:802-805), EGFP (Clontech Laboratories, Inc., Genbank Accession Number U55762), blue fluorescent protein (BFP, Quantum Biotechnologies, Inc. 1801 de Maisonneuve
  • EYFP enhanced yellow fluorescent protein
  • luciferase Rhoplasminogen activatories, Inc.
  • b galactosidase Nolan et al., 1988, Proc. Natl. Acad. Sci. U.S.A. 85:2603-2607
  • Renilla W092/15673, WO95/07463, WO98/14605, W098/26277, WO99/49019, U.S. Pat. Nos.
  • Binding to Fc Y RI is a measure of the ability of an antibody to mediate ADCC.
  • an assay to measure binding of the antibody to FcyRl can be conducted using methods known in the art.
  • Binding to the first component of complement, Clq is a measure of the ability of an antibody to mediate complement-dependent cytotoxicity (CDC).
  • CDC complement-dependent cytotoxicity
  • the half-life of an antibody can be measured by injection of the antibody into an animal model and measuring levels of the antibody in the serum over a certain period of time.
  • animal models include non-human primate models and transgenic mouse models.
  • the transgenic mouse models e.g. Tg32 or Tg276 transgenic mice
  • the human FcRn alpha chain can pair in vivo with the mouse p2-microglobulin protein forming a functional chimeric FcRn heterodimer.
  • Example 1 Alanine scanning mutagenesis of CH2 and CH3 domains of canine IgG.B
  • the PCR product was subcloned into the GenScript FASEBA plasmid, transformed into E. coli and sequence verified for the presence of the variant.
  • Upstream of the CH2 domain is the SASA (single-domain antibody against serum albumin) tag (See, e.g. US 2013/0129727A1) which has pM affinity for albumin.
  • the PelB (pectate lyase B) signal peptide is at the N-terminus to facilitate secretion of the Fc into the medium.
  • the expression of CH2-CH3 protein was regulated by the Lac promoter.
  • the supernatants from conditioned medium were analyzed for binding to canine FcRn
  • bovine serum albumin (BSA) was immobilized to CM5 sensor chip.
  • the sensor chip surface of flow cells 1 and 2 were activated by freshly mixed 50 mmol/L N-Hydroxysuccinimide and 200 mmol/L l-ethyl-3-(3- dimethylaminopropyl) carbodiimide hydrochloride for 420s (10 pL/min).
  • BSA diluted in 10 mM sodium acetate (pH 4.5) was injected into the flow cell 2 to achieve conjugation, while flow cell 1 was set as blank.
  • the running buffer for the binding experiment was HBS-EP (10 mM HEPES, 500 mM NaCl, 3 mM EDTA, 0.05% Tween 20, pH 5.5) and it was run at 25°C.
  • Supernatants from the alanine variants were injected over chip surface and captured via the SASA tag onto the immobilized BSA for 60 sec.
  • Canine FcRn at 400 nM was injected for 120 sec and the dissociation was complete with running buffer for 120 sec.
  • the flow rate for the immobilization phase of BSA was 10 m ⁇ /min and the flow rate for the association and dissociation phase was 30 m ⁇ /min. All of the data was processed using the Biacore 8K evaluation software version 1.1. The tabulated data is shown in Table 3 with the last column containing the average KD of wild-type divided by the variant KD. The sensorgrams are shown in FIGs. 7A-7U.
  • the NNK saturation mutagenesis method is an effective strategy to generate all 20 possible amino acids at a desired position (Hogrefe et al., Biotechniques. 33: 1158- 1 165 (2002)).
  • Individual NNK libraries at positions 250, 252, 254, 309, 31 1, 378, 380, and 434 (EU numbering) were generated.
  • the supernatants from ninety individual transformants from each library were assayed for binding to canine FcRn at pH 5.5 using the Biacore method described in Example 1. The only difference was the concentration of canine FcRn used in the assay was 200 nM not 400 nM.
  • the sensorgrams for all of the NNK library variants are shown in FIGs. 8-15.
  • variants T250E and T250Q have been demonstrated to bind tighter to human FcRn at pH 6.0 compared to wild-type human IgG2 Fc (Hinton et al., J. Biol. Chem. 279: 6213-6216 (2004)).
  • variant D378V The data for variant D378V is shown in Table 9 and the corresponding variant in human IgGl has been used in combinations with other IgG variants to demonstrate higher affinity to human FcRn at pH 6.0 compared to wild- type Fc and extending the half-life of human IgG in transgenic human FcRn mice (Monnet et al., MABS. 6: 422-436 (2014); Booth et al., 2018).
  • variant E380A is shown in Table 10 and the corresponding variant in human IgG has been shown to have higher binding affinity to human FcRn at pH 6.0 (Shields et al., J. Biol. Chem. 276: 6591-6604 (2001)).
  • Variants D378E, D378I, D378K, and E380F were not present in the NNK libraries and not screened for binding to canine FcRn.
  • variants N434Y, N434W, and N434R had a higher affinity for canine FcRn at pH 5.5 shown in Table 11.
  • Variants N434S and N434A did not have a higher affinity for canine FcRn at a low pH which is unlike the corresponding human IgGl variants (Petkova et al., Int. Immunol. 18: 1759-1769 (2006); Yeung et al., J. Immunol. 182: 7663-7671 (2009); Zalevsky et al., Nat. Biotechnol. 28: 157- 159 (2010); Deng et al., Drug Metab. Dispos. 38: 600-605 (2010)).
  • the NNK library screened at position 434 did not contain the N434F variant so the binding of this variant to canine FcRn was not tested.
  • Example 3 Binding kinetics for L252Y, N434Y, N434W, N434R, N434H and YTE (L252Y/A254T/T256E) variants and wild-type Fc
  • FcRn at pH 5.5 were further evaluated for binding kinetics to canine FcRn.

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Abstract

L'invention concerne des compositions pour augmenter la demi-vie d'un polypeptide ou de polypeptides chez les chiens et des procédés d'utilisation de celles-ci. Les compositions impliquent des régions Fc d'IgG canines variantes.
EP20708719.8A 2019-01-03 2020-01-02 Compositions pour augmenter la demi-vie d'un agent thérapeutique chez les chiens et procédés d'utilisation Pending EP3906259A2 (fr)

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US20200362035A1 (en) 2020-11-19
US20200216536A1 (en) 2020-07-09
MX2021008144A (es) 2021-10-13
WO2020142625A2 (fr) 2020-07-09
MA54657A (fr) 2021-11-10
SG11202106478UA (en) 2021-07-29
US20230279118A1 (en) 2023-09-07
US11548949B2 (en) 2023-01-10
US20240239896A1 (en) 2024-07-18
WO2020142625A3 (fr) 2020-10-08
WO2020142625A4 (fr) 2020-12-10
CN113544153A (zh) 2021-10-22
US20240166749A1 (en) 2024-05-23
WO2020142625A9 (fr) 2021-06-24
US20240239897A1 (en) 2024-07-18
AU2020205073A1 (en) 2021-08-19

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